Snorkeling & Diving in Osa Peninsula, Costa Rica
Caño Island sits 20 kilometres offshore from the Osa Peninsula in the open Pacific, surrounded by one of the most productive dive sites in Costa Rica. The water here runs clear and cold with upwelling nutrients that concentrate marine life in numbers that make every dive feel genuinely eventful — white-tipped reef sharks resting on the sand between coral formations, large schools of jacks working the current, hawksbill sea turtles moving through the reef at the pace of animals that have nowhere particular to be. The peak diving season runs January through April when visibility peaks at 20–30 metres and the dry season keeps the water calm enough for the hour-long boat crossing from Drake Bay and Puerto Jimenez.
Hammerhead sharks and whale sharks pass through in the deeper water on the island's western side during peak season — not guaranteed but reported regularly enough by dive operators to be a legitimate possibility. By May the rains reduce visibility significantly, and from August through October most operators suspend Caño trips entirely as weather and sea conditions make the crossing unreliable.
Weather & Conditions
| Month | High / Low | Rain Days | Conditions |
|---|---|---|---|
| Jan | 89° / 72°F | 5 | Good |
| Feb | 90° / 73°F | 3 | Peak |
| Mar | 92° / 74°F | 4 | Peak |
| Apr | 91° / 75°F | 8 | Peak |
| May | 89° / 74°F | 18 | Good |
| Jun | 88° / 73°F | 20 | Okay |
| Jul | 88° / 73°F | 16 | Okay |
| Aug | 87° / 72°F | 22 | Okay |
| Nov | 86° / 71°F | 18 | Okay |
| Dec | 87° / 72°F | 10 | Good |
Where to Go
Airstrip and jump-off point.
World-class right-hand points.
The biological heart of Osa.
Rainforest lodge reserve
Know Before You Go
Lapa Rios is open to the jungle. You will share your space with insects, monkeys, and macaws. It is not a manicured resort experience.
To minimize environmental impact, the bungalows at Lapa Rios do not have AC. They rely on ocean breezes and ceiling fans. The nights can be warm.
Even in the dry season, the jungle can be muddy. The lodge provides rubber boots, but bring clothes you don't mind getting dirty and wet.
Hotels & Lodges for Snorkeling & Diving
Lapa Rios
A pioneering rainforest lodge set in a private 1,000-acre reserve at the tip of Cabo Matapalo — one of the original and still definitive wilderness lodge experiences in Central America, where the bungalows are open to the jungle and the wildlife arrives uninvited.